Figure 3.

(A) Fiber tracts between SN and superior frontal gyrus visualized in a posterior coronal view. SN model is represented in blue, while SFG is colored in dark green. Notice the rich density and organization of these connections. (B) Anterior coronal view of fibers between SN and precentral gyrus. SN model is shown in blue, precentral gyrus in pale green. Fiber tracts run through the internal capsule and reach preferentially the posterior and lateral parts of SN. (C) Fiber tracts between SN and pars opercularis, pars triangularis and pars orbitalis. SN model is shown in blue, pars opercularis in yellow, pars triangularis in brown and pars orbitalis in light blue. Fibers run through the internal capsule and reach the anterior part of SN. (D) Posterior view of fiber tracts between SN and rostral middle frontal gyrus. SN is depicted in blue, while rMFG in pale purple. Streamlines mainly approach the anterior part of SN. (E) Fiber tracts between SN and paracentral lobule in anterior coronal view. SN is shown in blue, SMA in green. Fiber tracts mainly interest the posterior part of SN. (F) Fiber tracts between SN and postcentral gyrus visualized in anterior coronal view. SN model is depicted in blue, postcentral gyrus in orange. Streamlines spread mainly from the medial regions of postcentral gyrus, but also from the most infero-lateral ones.